Home / 15,519.42-21,416.85-8,445.87

Finding the Fourth Proportional to 15,519.42, 21,416.85 and 8,445.87

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Solution

The fourth proportional to 15,519.42, 21,416.85 and 8,445.87 is: 11,655.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,519.42 : 21,416.85 = 8,445.87 : x
  2. Step 2: Convert to fraction form
    15,519.42/21,416.85 = 8,445.87/x
  3. Step 3: Cross multiply
    15,519.42x = 21,416.85 × 8,445.87
  4. Step 4: Simplify right side
    15,519.42x = 180,883,930.91
  5. Step 5: Solve for x
    x = 180,883,930.91/15,519.42
  6. Step 6: Final answer
    x = 11,655.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.